provider.once returns text instead of numbers

[Owenchan007]

In this section, following the tutorial should return the number 1, but I got the wrong text instead

CODE

function listenForTransactionMine(transactionResponse, provider) {
    console.log(`Mining ${transactionResponse.hash}...`)
    // create a listener for the blockchain
    return new Promise((resolve, reject) => {
        provider.once(transactionResponse.hash, (transactionReceipt) => {
            console.log(
                `Completed with ${transactionReceipt.confirmations} confirmations..`
            )
            resolve()
        })
    })
}

ERROR

Completed with async confirmations() {
        return (await this.provider.getBlockNumber()) - this.blockNumber + 1
    } confirmations..

[Owenchan007]

Does this have anything to do with my use of ether.js 6?

[Bijan-F]

i had the same issue and found the answer here:
ethers-io/ethers.js#4256

my final listen for tx mine function:

function listenForTransactionToBeMined(txResponse, provider) {
    console.log(`Mining ${txResponse.hash}...`);
    return new Promise((resolve, reject) => {
        provider.once(txResponse.hash, async (txReceipt) => {
            await txResponse.wait(1);
            console.log(`Completed with ${await txReceipt.confirmations()} confirmations!`);
            resolve();
        });
    })
}

So basically transactionReceipt.confirmations is a method which means it should be written like this:
transactionReceipt.confirmations()
and it also returns a promise so you should use await and since the listenForTransactionToBeMined isn't async and we want it to stay like this(for some reason idk why), i added the async keyword before the anonymous function in the second argument of provider.once:
provider.once(txResponse.hash, async (txReceipt) => {

and i also figured out if i don't add the await txResponse.wait(1); line, it logs with 0 confirmations.

hope this helps